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GEOLOGY “praktis” LICENSURE EXAMINATION
July 11, 2011
Petrology and Mineralogy
1. A thin section is being
prepared for staining test to determine what kind of feldspar is present in the
sample. Which of the following acids
should be used to etch the thin section?
A. hydrofluoric acid
C. cold hydrochloric acid
C. cold hydrochloric acid
B. phosphoric acid
D. warm hydrochloric acid
D. warm hydrochloric acid
2. After dipping an etched
carbonate sample in alizarin red S solution, the following minerals will stain
deep red EXCEPT
A. high magnesium calcite
C. aragonite
C. aragonite
B. ankerite
D. witherite
D. witherite
3. Nesosilicates are isolated SiO4
tetrahedra. Which of the following is
NOT a nesoslicate?
A. garnet
C. epidote
C. epidote
B. olivine D. kyanite
4. What mineral property will BEST
distinguish graphite from galena?
A. color C.
cleavage
B. streak D. luster
5. Quartz comes in various colors
due to presence of impurities. Which
quartz variety is given a distinct red color by hematite?
A. jasper C. citrine
B. rose quartz D. amethyst
6. How many grams is 1 carat?
A. 1 gram C. 2 grams
B. 0.1 gram D. 0.2 gram
7. What crystal system has three
mutually perpendicular axes, of which the horizontal axes are equal in length?
A. orthorhombic C. isometric
B. tetragonal D. hexagonal
8. What happens to the color bands
in quadrants 1 and 3 as the mica plate is slowly inserted over a uniaxial
positive figure?
A. move toward the center C.
turn into yellow
B. move outward to the edge of the
field D. turn
into blue
9. Which of the following is the
aggregate term used to describe a surface covered with a layer of small
crystals?
A. acicular C. capillary
B. botryoidal D. drusy
10. Isotropic substances include
gases, liquids, glass, and minerals of the ______ crystal system.
A. Triclinic C. Isometric
B. Monoclinic D.
Hexagonal
11. The following metals occur in
native form EXCEPT
A. iron C.
silver
B. lead D.
platinum
12. Which of the following is NOT
a sulfide mineral?
A. galena C.
enargite
B. bornite D. pyrrhotite
13. Which of the following gives
stainless steel its high hardness, great toughness, and resistance to chemical
attack?
A. chromium C. iron
B. titanium D. tin
14. The following belong to the
same crystal system EXCEPT
A. chalcopyrite C.
halite
B. pyrite D. fluorite
15. The gem aquamarine is a
blue-green colored ______.
A. quartz C.
jade
B. beryl D.
topaz
16. Which of the following is a
phaneritic igneous rock with a modal content of:
Quartz = 50%, Alkali feldspar =
25% and Plagioclase = 25%?
A. gabbro C. granite
B. basalt D. rhyolite
17. If magma is oversaturated with
respect to silica, which of the following is TRUE?
A. Quartz should precipitate from the magma and be
present in the rock.
B. Olivine should precipitate from
the magma and be present in the rock.
C. Sodalite should precipitate
from the magma and be present in the rock.
D. Nepheline should precipitate
from the magma and be present in the rock.
18. A foliated metamorphic rock with its platy
minerals big enough to be identified by the unaided eye, but without clear
segregation of light and dark minerals into bands, can be appropriately called
_____.
A. slate C. schist
B. phyllite D. gneiss
19. Which of the following
describes the environment in which mylonite can form?
A. Within deeply buried
sandstones.
B. Within metamorphic soles of
ophiolites.
C. Along edges of plutons,
particularly within aureoles.
D. Along ductile faults where syntectonic crystal-plastic
processes occur.
20. Zeolites are formed by…
A. contact metamorphism of limestone.
B. contact metamorphism of shale.
C. burial metamorphism of tuff.
D. regional metamorphism of
basalt.
21. A well-sorted quartz sandstone
could have formed in which of the following environments?
A. lacustrine C. glacial
B. beach D.
stream
22. The following are common
cements in detrital sedimentary rocks EXCEPT
A. clay C.
hematite
B. silica D. calcite
23. Arksosic sandstones form in
which of the following conditions?
A. arid C. glacial
B. wet D. tropical
24. In describing a sample of
clastic sedimentary rock, which of the following characteristics is essential?
A. clast size C. clast
roundess
B. sorting D. all of the above
25. Presence of sedimentary
structure in a rock sample gives a clue on…
A. provenance C. environment of deposition
B. composition D.
chemical weathering agent
26. The presence of which of the
following minerals will assure you that the dark-colored aphanitic rock sample
you have is basalt and NOT andesite?
A. orthopyroxene C. olivine
B. clinopyroxene D. quartz
27. Which of the following is NOT
TRUE of igneous rocks?
A. Texture depends to a large extent on the composition
of the magma.
B. Rocks with the same mineral
composition can have widely varying textures.
C. Generally, rocks containing
lots of feldspars and quartz are light-colored.
D. Feldspars are, in general, the
most abundant minerals that occur in igneous rocks.
28. The mineral assemblage
muscovite-chlorite-quartz is indicative of what metamorphic facies?
A. amphibolite C.
granulite
B. greenschist D.
eclogite
29. Lateritic soils form by…
A. weathering of limestone C. weathering of chert
B. weathering of ultramafics D. weathering of arkosic
sandstone
30. Which of the following is ALWAYS
TRUE of a clast-supported sedimentary rock?
A. It is bedded.
B. It is poorly-sorted.
C. It has little or no matrix.
D. It has a gravel matrix.
31. What is the size range of
sand?
A. 0.062 – 2mm C.
2 – 4mm
B. 0.031 – 1mm D.
0.008 – 0.125mm
32. The following are common heavy
minerals EXCEPT
A. garnet C.
rutile
B. zircon D. fluorite
33. Pressure dissolution can take
place once a rock is fully cemented to produce irregular or suture planes
called ___________.
A. fractures C. cleavage
B. stylolites D. diaphragm
34. Which of the following is the
dominant clay in bentonite, giving it the unusual property of expanding several
times its original volume when placed in water?
A. montmorillonite C. illites
B. kaolinites D. chlorites
35. The fine-grained (less than 4
microns), usually dark carbonate matrix in limestones is called __________.
A. lime C. micrite
B. stylolite D. stromatolite
36. What is the hydrous form of
anhydrite?
A. gypsum C. barite
B. goethite D. apatite
37. Apatite belongs to what
mineral group?
A. silicates C. carbonates
B. phosphates D. sulfates
38. Microcline belongs to what
silicate group?
A. inosilicates C. cyclosilicates
B. nesosilicates D. tectosilicates
39. _______is a dike rock
consisting almost entirely of quartz and feldspars, having a characteristic fine-grained
sugary texture.
A. aplite C. lamprophyre
B. pegmatite D. migmatite
40. What is the chemical bonding
present in diamond?
A. ionic C. metallic
B. covalent D. van der Waals
41. Glass is NOT a mineral
because…
A. it has impurities C. it is not produced by
organisms
B. it is made up of SiO2 D.
it does not have an ordered internal structure
42. A mineral’s streak can be
obtained by…
A. dissolving the mineral in water C. scratching the mineral on a
harder surface
B. heating the mineral up to 300°C D. illuminating
the mineral with UV light
43. Based on luster, which of the
following DOES NOT belong to the group?
A. talc C. calcite
B. biotite D. fluorite
44. The basis of the compositional
classification of minerals is the _______.
A. luster C. density
B. anion D. type of chemical bond
45. The basic unit of silicates is
composed of….
A. 1 Si atom and 4 oxygen atoms C. 2 Si atoms and 1
oxygen atom
B. 1 Si atom and 2 oxygen atom D.
4 Si atoms and 1 oxygen atoms
46. Obsidian is formed due to…
A. excess silica C. very fast cooling of magma
B. high amount of dissolved gases D. very high
temperature of magma
47. Based on texture, which of the
following DOES NOT belong to the group?
A. schist C. phyllite
B. gneiss D. quartzite
48. Which of the following can be
a protolith of slate?
A. basalt C. mudstone
B. granite D.
limestone
49. Which of the following is TRUE
about a coarse-grained sedimentary rock having angular clasts?
A. It was transported by
groundwater.
B. It was transported at very low
velocities.
C. It was deposited in a coastal
environment.
D. It was deposited not too far from the source rock.
50. Which of the following refers
to the open crystal form made up of two parallel faces?
A. dome C. pinacoid
B. prism D.
disphenoid
51. Plagioclase feldspars form, at
elevated temperatures, an essentially complete solid solution series. Which of the following is arranged from pure
NaAlSi3O8 to pure CaAl2Si2O8?
A. albite, oligoclase, andesine, bytownite,
labradorite, anorthite
B. albite, oligoclase, andesine, labradorite, bytownite,
anorthite
C. anorthite, labradorite,
bytownite, andesine, oligoclase, albite
D. anorthite, bytownite,
labradorite, andesine, oligoclase, albite
52. Which of the following is TRUE
about the Becke line when the tube of the microscope is lowered?
A. The line moves toward the mineral/medium having the
lower index of refraction.
B. The line moves toward the
mineral/medium having the higher index of refraction.
C. The line moves toward the
mineral/medium having lower specific gravity.
D. The line moves toward the
mineral/medium having higher specific gravity.
53. Which among the following
types of twinning is the MOST useful in plagioclase identification?
A. albite C. Carlsbad
B. Baveno D. Manebach
54. _______ refers to a texture of
plutonic igneous rocks where large grains of feldspar enclose many small
imperfectly developed quartz crystals, resembling ancient writing.
A. graphic C. Schlieren
B. gneissic D. skialith
55. Which of the following refers
to the closed crystal form composed of six faces of which the three faces at
the top alternate with the three faces at the bottom, the two sets of faces
being offset by 60°?
A. cube C. rhombohedron
B. dipyramid D. trapezohedron
56. Which of the following
describes Riecke’s principle?
A. Solution takes place at points of greatest pressure in
a crystal, with concurrent precipitation at the area of least pressure.
B. Water and other volatiles may
be transferred from one igneous body to the surrounding rocks as juvenile
water.
C. Hydrostatic pressure, operating
equally in all directions, is largely determined by depth.
D. Thermal gradient increases with
depth.
57. Which of the following refers
to the globular mineral aggregates resembling a bunch of grapes?
A. globular B. reniform C. botryoidal D. mammillary
58. What mineral was used in
fireworks to give a brilliant white light when mixed with saltpeter and
ignited? Today, artificial arsenic sulfide is used for this purpose.
A. realgar B. orpiment C. cinnabar D. stibnite
59. Which of the following is NOT
a variety of gypsum?
A. alabaster B.
selenite C. satin spar D. soda niter
60. Which of the following is TRUE about
extinction of a mineral?
A. The vibration directions of the slow and fast rays are
parallel to the planes of vibration of the polarizers.
B. The vibration directions of the
slow and fast rays are perpendicular to the planes of vibration of the
polarizers.
C. The order of color increases
when the mica plate is inserted.
D. The order of color decreases
when the mica plate is inserted.
61. How do isotropic minerals look
like under crossed polars?
A. give a play of colors when the
stage is rotated
B. display only one dominant
color, usually red
C. remain colorless when stage is
rotated
D. remain dark when the stage is rotated
62. Which of the following refers
to the green variety of microcline?
A. aventurine C. jadeite
B. amazonstone D.
emerald
63. Which of the following DOES
NOT describe galena?
A. PbS C. dull
B. cubic D.
lead-gray
64. ______refers to the appearance
of a cabochon gemstone in which a band of light appears at right angles to the
length of the fibers or direction of the inclusions in the mineral.
A. asterism C. chatoyancy
B. iridescence D. luminescence
65. Which of the following DOES
NOT have polymorph minerals?
A. chalcopyrite C.
calcite
B. diamond D. pyrite
66. _______are intrusive rocks
occurring as veins, dikes or patches with extremely coarse texture having
crystals over several feet in length and several inches in diameter.
A. aplite C.
lamprophyre
B. pegmatite D. migmatite
67. A properly ground thin section
shows a remarkable degree of transparency. What thickness of the rock chip
should be achieved for this?
A. 0.01 mm C.
0.05 mm
B. 0.03 mm D.
0.07 mm
68. If a thin section of quartzite
has the correct thickness (answer in Question #67), quartz grains with
horizontally-oriented optic axes should show the highest order of interference
color of ________.
A. pale yellow C. white
B. blue gray D. orange
69. The polarizing microscope
utilizes two polars. What is another
name for the polars?
A. condensers C. nicol prisms
B. Bertrand lens D.
compensators
70. _______is the possession of
more than one index of refraction.
A. interference C. extinction
B. birefringence D.
retardation
71. When an anisotropic mineral
appears dark between crossed polars, it is said to be in the position of
__________.
A. interference C.
extinction
B. birefringence D.
retardation
72. Which of the following should
you do first in the adjustment of the polarizing microscope for examination of
thin sections?
A. Crossing the polars
B. Testing the cross hairs
C. Centering the stage with the field
D. Determining the vibration plane
of the lower polar
73. Which of the following is NOT
TRUE about orthoscopic observation?
A. provides the eye with a
realistic virtual image
B. observed under crossed or
uncrossed polars
C. does not need an inserted
quartz wedge
D. needs the Bertrand lens to be observed
74. Minerals under the following
crystal systems yield biaxial interference figures EXCEPT…
A. triclinic C. hexagonal
B. monoclinic D. orthorhombic
75. Which of the following is TRUE
about a uniaxial positive mineral cut perpendicular to the optic axis when
viewed with an inserted gypsum plate?
A. The quadrants parallel to the slow-ray vibration
direction of the plate are colored blue.
B. The quadrants parallel to the
fast-ray vibration direction of the plate are colored blue.
C. The black cross moves from the
center towards the direction of the slow-ray of the plate.
D. The black cross remains at the
center, but the colored bands move outward to the edges.
76. Anisotropic minerals exhibit a
change in color as the stage is rotated known as ______.
A. opalescence C. asterism
B. pleochroism D. polymorphism
77. ______ are dike rocks made up
of more than one-third dark minerals.
A. aplite C. lamprophyre
B. pegmatite D. migmatite
78. Which of the following refers
to altered tuff?
A. adobe C. caliche
B. bentonite D. diabase
79. Lapis lazuli is a mixture of
mineral ________ together with small amounts of calcite, pyroxene and other
silicates. As a powder, lapis lazuli was formerly used as the paint pigment
ultramarine.
A. lazurite B. lazulite C. turquoise D. azurite
80. What is the chemical formula of
chalcopyrite?
A. Cu2S B.
Cu3AsS4 C. CuFeS2 D. Cu5FeS4
81. Moonstone is a special name
given to _______ because it shows an opalescent play of colors.
A. quartz B. adularia C.
talc D. garnet
82. What is the chemical formula
of bornite?
A. Cu2S B. Cu3AsS4 C.
CuFeS2 D. Cu5FeS4
83. What is the volcanic
equivalent of granodiorite?
A. andesite B.
rhyolite C. trachyte D. dacite
84. ________ refers to a
calcareous material deposited from spring waters (frequently thermal springs)
under atmospheric conditions.
A. Iceland spar B. travertine C.
satin spar D. chalk
85. What metamorphic facies
represents the most deep-seated conditions of metamorphism and characterized by
pyrope-rich garnet and omphacite minerals common in kimberlite pipes?
A. eclogite B. granulite C. amphibolites D.
greenschist
86. Mineral X can scratch mineral
Y and the fingernail. The fingernail can scratch mineral Y but not mineral X. Mineral
Y can scratch the fingernail but not mineral X. What is the hardness of mineral
Y?
A. greater than 2.5 C. equal to 2.5
B. less than 2.5 D. cannot be determined
87. Which of the following is TRUE
in the F (phi) scale for particle grain size?
A. uses inches as unit of measure
B. uses millimeters as unit of
measure
C. number becomes higher as grain
size increases
D. number becomes smaller as grain size increases
88. What mineral or rock is the
“Zambales Jade”?
A. uvarovite B.
malachite C. sericite schist D. serpentinite
89. What mineral or rock is the “Mindoro
Jade”?
A. uvarovite C. sericite schist
B. malachite D. serpentinite
90. Bragg Equation, which is
expressed as nl=2d sinq, is about…
A. extinction C.
birefringence
B. polarization D. x-ray diffraction
91. Which is the most abundant
element in the Earth’s crust?
A. oxygen C. iron
B. magnesium D.
silicon
92. Opal is a ______.
A. mineral B. mineraloid C.
crystal D. fossil
93. Basalt can have any of the
following descriptions EXCEPT…
A. amygdaloidal C.
vesiculated
B. banded D. aphanitic
94. Which of the following refers
to a solid solution of Ag and Hg?
A. amalgam B. electrum C. taenite D. kamacite
95. What mineral is called the
“peacock ore”?
A. lazurite B. bornite C.
galena D.
sphalerite
96. Which of the following is NOT
TRUE about calcite?
A. It is a carbonate.
B. It effervesces in cold acid.
C. It has a hardness of 3 on all faces.
D. It is under the hexagonal
crystal system.
97. What is a diagnostic feature
of barite?
A. white color C. low hardness
B. pearly luster D. high specific gravity
98. Tourmaline is easily
recognizable by its ______ form.
A. rhombohedral C. cubic
B. trigonal prismatic D. spherical
99. Mica and biotite can be easily
differentiated by their ______.
A. color C. luster
B. hardness D. cleavage
100. The presence of what mineral
can help differentiate gabbro from diorite?
A. plagioclase C. biotite
B. pyroxene D. olivine
may possible po ba to lalabas sa November 2022 board exam po?
ReplyDeleteThat's the thing with board exams; we really don't know what the fuck would be there. I have no idea but it could be po.
DeleteAll we have to do is read and read. Just like what I always say, paramihan ng nabasa and naintindihan. You should be voracious with what you read po.